What Every Parent Should Know About Youth Athlete Nutrition

Your kid just finished a two-hour basketball practice. They come home, grab a bag of chips and a sports drink, and call it dinner. Or maybe they barely eat at all because "they're not hungry." Either way, you have a nagging feeling that what they're putting in their body doesn't match what they're asking it to do.

You're probably right. Youth athlete nutrition is one of those topics where most families are operating on guesswork, old habits, or whatever the internet served up last. This isn't about handing you a meal plan. It's about understanding a few key principles so you can make better decisions without overthinking every snack.

Growing Bodies Need More Than You Think

Here's a number that surprises most parents: according to the American Academy of Pediatrics , young athletes may need anywhere from 2,000 to 5,000 calories per day, depending on the sport, training volume, age, and growth stage. That's not a typo. A 14-year-old competitive swimmer in heavy training can need as many calories as a full-grown adult.

The problem is that most kids don't eat enough to keep up. They're growing, training, going through puberty, and burning through energy at a rate that three regular meals can't always cover. When calorie intake falls short of what the body needs, performance drops, recovery slows, and injury risk goes up.

Hydration: The Easiest Win

If you do nothing else after reading this article, focus on water. The American College of Sports Medicine (ACSM) has shown that even 2% dehydration can reduce athletic performance by up to 25%. For a kid, that's not a lot of lost fluid — especially on a hot practice day when they're not thinking about drinking.

A practical rule: have your child drink 16-20 ounces of water in the two hours before practice, and 4-8 ounces every 15-20 minutes during activity. After training, they should drink enough to replace what they lost. Plain water is fine for activities under 60 minutes. For longer, more intense sessions, a drink with electrolytes and a small amount of carbohydrate can help — but most kids don't need sports drinks as their daily beverage.

Carbs Are Not the Enemy

Somewhere along the way, carbohydrates got a bad reputation. For young athletes, that's dangerous thinking. Carbs are the primary fuel source for high-intensity activity. The AAP recommends that roughly 50% of a young athlete's calories come from carbohydrates — whole grains, fruits, vegetables, and starchy foods like rice and pasta.

Before a game or practice, a carb-focused snack about 1-2 hours beforehand gives the body fuel it can use quickly: a banana with peanut butter, a granola bar, toast with jam. After activity, a combination of carbs and protein within 30-60 minutes helps with muscle recovery and energy replenishment. Think chocolate milk, a turkey sandwich, or yogurt with fruit.

The Protein Myth

Many parents assume their young athlete needs protein shakes, bars, or supplements to build muscle. In most cases, they don't. The AAP notes that most young athletes get more than enough protein from regular food — chicken, eggs, dairy, beans, nuts, and whole grains provide what growing muscles need.

Protein supplements aren't regulated the same way as food, and some contain ingredients that haven't been tested in children. Unless a doctor or registered dietitian has specifically recommended supplementation, real food is the better and safer choice.

Calcium and Growing Bones

Young athletes are building the skeleton they'll carry for the rest of their lives. The National Institutes of Health recommend 1,300 mg of calcium per day for children ages 9-18 — that's about four glasses of milk, or the equivalent from yogurt, cheese, fortified orange juice, leafy greens, or tofu.

Athletes who don't get enough calcium — especially girls and athletes in weight-sensitive sports — are at higher risk for stress fractures. This connects directly to the next topic.

RED-S: The Risk No One Talks About

Relative Energy Deficiency in Sport (RED-S) happens when an athlete chronically takes in fewer calories than their body needs. It's not just about being thin — it affects bone health, hormone function, immune response, growth, and mental health. According to a 2023 IOC consensus stateme...